Air-brake.



'G. O. GALBRAITH.

'1 AIR BRAKE.

APPLICATION FILED SEPT. 27, 1910.

Patented Apr. 11, 1911.

GEORGE 0. GALBRAITH, F RICHMOND, CALIFORNIA.

AIR-BRAKE.

Specification of Letters Patent.

Patented Apiazll, 1911.

Application filed September 27, 1910. Serial No. 584,086.

To all whom it may concern;

Be it known that I, Gnoncn t). (iAL- BRAITH, a citizen of the United States, residiug at Richmond, in the county of Contra Costa and State of California, have invented certain new and useful Improvements in Air-Brakes; and .I do hereby declare the following to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art tc which it appertains to make and use the same.

This invention relates to air brakes specially intended for use on automobiles; and it consists in the novel construction and con'ibination of the parts hereinafter fully described and. claimed.

In the drawings, Figure l .is a plan view of the brake, showin the air cylinder in section. Fig. 2 is a side view, showing the air valve in section.

A is the brake cylinder which is arranged horizontally and secured to the frame 01'- the automobile in any approved manner.

B is the air piston and b is the piston-rod having a double-eye b on its projecting end.

0 is a lever pivoted to the fame of the automobile by a pin 0 in any approved way. One end of the lever C is pivoted to the double eye b by a pin 0', and its other end is pivotally connected with a brake-shoe E by a pin 6.

The brake-shoe may be connected with the lever by any approvedintermediate connecting devices to enable the brake cylinder to be securel in the most convenient position, and to enable the brake-shoe to bear against one of the road wheels, and the brake may be constructed to operate on two road wheels each brake-shoe being operatively connected with the lever C in any approved manner.

F is a spring arranged inside the cylinder and normally'holding the brake-shoe clear of the road Wheel.

G is a flange at the other end of the cylinder from the spring, and H is a cover plate secured to 'the flange G by bolts y. plate H has a horizontally projecting 'chamher h which communicates with the interior of the cylinder, and which has a circular recess h at its top, and ports 2' and d which extend through its top.

I is a disk valve journaled in the recess h and provided with a vertical operating spindle J, which is arranged at a right-angle to the axis-of the cylinder. The spindle is provided with any suitable handle j on its The" upper end, and this handle is arranged in suitable and convenient proximity to the controllinghandles and levers of the automobile. The ha ndlc may be secured directly to the spindle, or'thc spindle may be formed in sections connected together by any suitable universal joint or coupling.

K is a cover plate secured to the chamber It over the disk valve. This cover plate is provided with an exhaust port It, and the valve is provided with a hole i for placing the port in communication with the port In.

L is a reservoir for compressed air secured to the frame of the automobile in any convenient position, and m is a pipe which COIIl'lQClIS the reservoir L with the cover plate K of the valve. The hole in the valve is arranged so that it can place the pipe m in communication with the port cl when the valve is closing the connection of the port 2' with the exhaust port. The reservoir L is supplied with compressed air by any approved form of pump.

The brake is applied by the compressed air when the valve is moved in one direction, and is released by the spring when the of the cylinder, said valve being arranged in the said recess and provided with a hole, a reservoir for compressed air, a 'cover plate provided with an exhaust port and secured to the said chamber over the valve, and an air-supply pipe connecting the reservoir with the last said cover plate, said valve being oscillated to connect the aforesaid ports with the supply pipe and with the exhaust port alternately. I

2. In an air brake, the combination, with a brake cylinder provided with a piston and a piston-rod, and brake mechanism operatively connected with the said rod; of a spring arranged in one end of the cylinder and operating to release the brake auto matically. a cover plate closing the other end of the cylinder and provided with a projecting chamber said chamber having a circonnecting the reservoir with the last said cular recess in its top and ports extending cover plate, said valve being oscillated to through its top, adisk Valve provided with connect the aforesaid ports With the supply an operating spindle arranged at a rightpipe and With the exhaust port alternately.

5 angle to the axis of the cylinder,'said valve In testimony whereof I have afiixed my 15 being arranged in the said recess and prosignature in the presence of two Witnesses.

vided With a hole, a reservoir for com- 7 GEORGE O. GALBRAITH. pressed air, a cover plate provided With an \Vitnesses: v exhaust port and secured to the said cham- A. G, J ACKSON,

1.0 her over the valve, and an air-supply pipe i F. CUsHING. 

